If I wrote a Python implementation in JavaScript, I'd probably have some hubris about it as well.
I'm not sure if the developer is one person or if they wrote the landing page as well, but let's assume it is that same person.
If someone has focused enough energy to implement a language in JavaScript, it is probably fair say that marketing isn't his or her primary skill.
At the same time, reading over the text again, people have said crazier things and done much less. If the developer's goal is to replace JavaScript with Python and his or her first attempt is to implement Python in JavaScript, I, for one, applaud their effort.
I'm not sure if the developer is one person or if they wrote the landing page as well, but let's assume it is that same person.
If someone has focused enough energy to implement a language in JavaScript, it is probably fair say that marketing isn't his or her primary skill.
At the same time, reading over the text again, people have said crazier things and done much less. If the developer's goal is to replace JavaScript with Python and his or her first attempt is to implement Python in JavaScript, I, for one, applaud their effort.